Firearm



C.- C. LOOMIS Aug. 4, 1931.

FIREARM Filed June 5. 1929 INVENTOR. w 01 a C LW 1 Lra Patented Aug. 4, 1931 entree stares PATENT ()FFECE I CRAWFORD O. LOOMIS, OF ILION, NEW YORK, ASSIGNOR -'1O REMINGTON ARMS COM- PANY, INC., A CORPORATION OF DELAWARE FIREARM Application filed. June 1929. Serial No. 368,718.

The presentinvention relates to repeating firearms of the type wherein the action mechanism is operated by manual reciprocation of a forearm which is mounted for longitudinal movement on a tubular magazine beneath the barrel. v V

The devices of the present invention have special adaption to and constitute certain improvements over such a firearm as is .disclosed inthe patent to J. D. Pedersen, No. 789,933, May 6, 1905, although, as will be apparent from the following description, much of the novel structure is of general application to firearms of other types.

The invention contemplates an improved.

construction of the forearm and its mounting on the magazine tube, and it-is an object of the invention to provide a forearm which is smoothly reciprocable on the magazine tube, and'at the sametime free from all objectionableloosen'ess and side wabble. 7 It is a further object to provide efficient stops for limiting the forward movement of the forearm, while still permitting the forearm to be easily assembled on and removed from the magazine tube.

The invention further contemplates an improved barrel lug construction for detachably connecting the forward end of the magazine tube with the barrel, and it is a further object of the invention to provide a lug that is easily attachable and removable, at the same time affording a sturdy support for absorbing shocks from violent operation of the forearmon themagazine tube.

These and further objects will appear more.

fully from the following description, reference' being bad to the accompanying drawings', which form a part of this specification.

Inthe drawings:

Fig. 1 is a fragmentary side elevation, of a type of firearm adapted for employment of the improved devices of the present invention. V

Fig. 2 is.a fragmentary side elevation, partly in section, of a magazine tube and forearm, showing the improved construction of the present invention.

Fig. 3 is a transverse section, taken as indicatedat 3-3'in Fig. 2.

Fig.14 is a transverse section of the magazinetube, taken at the point indicated at 44e in Fig. 2. v

Fig. 5 is atransverse section of a magazine tube and forearm, taken at a point correspondingwith that ofFig. 3, but showing an old construction over which the present lnvention constitutes an improvement.

Figs. 6 and 7 are fragmentary side elevations of the improved barrel lug construct-ion of the present invention, Fig. 7. being partly in section. Y l I Fig. 8 is a transverse section, taken through the gun barrel at a point indicated at 8-8 in Fig. 6,showing'the improved lug in assembled position on the barrel.

In Fig. 1'is shown a firearm of. the general type disclosed in the above-mentioned patent,

embodying a barrel 10 and magazine tube 11, each detachably mounted in a receiver 12 by any approved construction, such for example as the common expedient of interrupted threads.v A forearm designated generally by the numeral 14 is provided surrounding the magazine tubeand slidable thereon to manually operate the action mechanism housed within the receiver. This operation is effected through the medium of an action bar 15 (Fig. 2) connected at its forward end to the forearm and extending rear wardly through the aperture inthe forward portion of the receiver to engage the action mechanism.

' The improved forearm construction and mounting of the present invention is shown in Figs. 2, 3 and 4. Referring to Fig. 2, the handle portion 16 encloses a tubular liner 17 which in turn surrounds the'magazine tube. The forward portion 18 ofthe liner is contracted to form a bearing surface slidable on the magazine tube, the liner over a large part of its length being spaced from the tube. At its rear end the liner surrounds and is secured to the bodyportion of an end collar 19 which slidably bears on the magazine tube and forms the rear bearing for the forearm. The liner 17 may be secured to the end collar 1.9 by any suitable means such as brazing, Welding or pinning theparts together. How ever, it is preferredto provide'screw threads side. cut away leaving spaces 240 at the sides, as

on the liner and end collar and to cut a shallow channel-like indentation through the threads of the end collar at a point on its periphery into which indentation the adjacent portion of the liner may be depressed after the liner is screwed on the collar in order to lock the liner to the collar and prevent detachment. The rear end collar 19 is flanged at 20 to engage the rear end of the handle .16. The action bar 15 is secured to the rear endcollar 19, being either formed integral therewith or detachably secured thereto by any suitable means. At the forward and of the forearm a forward end collar 21 is threaded over the'contract'ed portion 18 of the liner, and an annular recess 22 in this collar encloses the adjacent end of the handle 16 to hold the handle rigidly in place on the liner by a clamping action be tween the forward and rear end collars when the collar 21 is screwed up tightly. It will be noted that the collar 21 is threaded on the exterior of the liner and does not abut against the end of the liner, as is the case in prior construct-ions, thus allowing for a tight engagement'of the collar with the handle regardless of shrinkage and wear of the latter.

Lugs 23, integral with the magazine tube and riding in the space between the tube and the liner, serve to limit the forward movement of the forearm by engagement withportions of the rear end collar 19 which lie in their paths of movement.

In Fig. 5 is shown the construction as used heretofore, wherein the portions 190 of the liner served as abutments for the lugs 230 shown in dotted lines. The lugs 280 consisted of upper and lower segments integral with the magazine tube with a space at each The liner abutments were similarly shown, in order that the tube and forearm were rotated 90 relative to each other the lugs 230 would be placed in line with the spaces 240permitting the rear end collar to be moved forward over the lugs for removal rear end collar were the cause of objectionof the forearm. It was found that with the parts in the assembled position of Fig. 5 the spaces 24 separating the sides of the magazine tube from the adjacent portions of the able side sway or wabble of the forearm when the latter was manipulated.

The present invention contemplates elimination of this objectionable side sway. Accordingly, by the construction shown in Figs. 2 and 3, steadying lugs 25 are positioned in the side channels 24, which-channels correspond with the spaces 240 of Fig. 5. These lugs 25 are formed integral with the end collar 19 and bearlightly against the sides of the magazine tube to take uplost motion and prevent wabb'le'of the forearm; Removal of the forearm from the magazine tube is effect- ,ed by a 90 rotation of the parts relative to each other as in the old construction described previously in connection with Fig. 5; but in the improved construction when the parts are thus rotated the steadying lugs 25 will be brought into alignment with the stop lugs 23, making it necessary to allow for passage of the steadying lugs 25 through the stop lugs 23. To accomplish this, cut away portions 26 of a width sufiicient to accommodate the. lugs 25 are provided in lugs 28. The abutments19 of the'liner are accommodated in the side channels 24 and thus the forearm may be moved forwardly along the tube for removal therefrom.

As before mentioned, the present invention further contemplates the provision of a barrel lug of improved construction. This barrel lug designated generally by the numeral 13 serves to connect the forward end of the magazine tube and the barrel rigidly together and to form a support to take up shock transmitted to the magazine tube when the forward movement of the forearm is violently arrested by the stop lugs previously described. The cylindrical portion 32 integral 'with the lug is adapted to fit in the end of the magazine tube and forms an attaching means engageable with locking devices arranged in the tube and which may be controlled by a latch member 83 (Fig. l) Such locking devices form no part of the present invention. however, and for a complete disclosure of the same reference may be had to the patent to Pedersen, No. 789,983,'before mentioned.

It is desirable in firearms of this type to make this lug detachable from the barrel in order that when it is desired to substitute the barrel for another the barrel lug may be removed and be fitted to the new barrel. 7 Detachable constructions of lugs heretofore have involved the use of screws requiring special tools for detachment and attachment with attending inconvenience. According to the construction of the present invention no screws are used and detachment and assembly may be effected by a comparatively simple operation. Referring to Figs. 6, 7 and 8, the barrel lug 13 is seen to embody two upwardly extending spring clamping-arms 27 which snugly embrace the gun barrel. [it the lower portion of the barrel there is attached by any suitable expedient, such as welding or brazing, a small plate member 28 having a plurality of transversely extending notches 29 of rectangular cross section formed on its lower surface. These notches are adapted to receive upwardly projecting teeth 30 formed on the adjacent portion of the barrel lug; these teeth being of a size and shape to be accommodated within the notches 29. Adjacent the teeth 30 the lug is cut away to form lateral shoulders 81 (Fig. 8) engageable with the sides of plate 28 to prevent lateral displacement ofthe lug. Thus the lug is seen to be firmly held against lateral or longitudinal movement relative to the barrel, and to form a sturdysupport for absorbing shocks transmitted to it by violent operation of the forearm.

Detachment of the lug 13 may be effected by simply prying the spring-clampingarms 27 away from the barrel, with a suitable tool, causing a short descent of the lug to clear the teeth 30 from the notches 29, whereupon the lug may be moved forward to clear the plate 28 and thus be removed from the barrel. Assembly may be effected by a reversal of this procedure, the clamping-arms being held sprung-until the teeth 30 are brought into alignment with the notches 29 when release of the clamping-arms will cause them to snugly embrace the barrel and cause the lug to rise somewhat, bringing the teeth into mesh with the notches.

Having fully described mysinvention, what I claim isi 1. In a repeating firearm, a magazine, a forearm slidable on said magazine, stops on the magazine for limiting the forward movement of said forearm, a barrel, a. barrel lug joining the forward end of the magazine with the barrel, a plate integral with the barrel, said plate and lug having intermeshing teeth and notches, and spring clampingarms integral with said lug snugly embracing the barrel to hold said teeth and notches in mesh.

2. In a firearm comprising a barrel and a part to be mounted thereon, in combination, a twopart mounting lug, one part of said lug having upwardly extending spring clamping-arms tending to spring toward each other, said arms embracing the barrel to hold said lug in place by the inherent spring clamping eflect of said arms, and the second part of said lug comprising means on said barrel coacting with the first mentioned part to prevent lateral and longitudinal displacement thereof.

3. In combination with a firearm barrel, a mounting lug therefor, said barrel and said lug being provided with teeth and notches intermeshing to prevent longitudi al and lateral displacement of said lug, and means comprising spring clamping-arms carried by said lug and embracing said barrel to hold said teeth and notches in mesh.

4. In combination with a firearm barrel, a detachable mounting lug therefor, said barrel and said lug being provided with teeth and notches intermeshing to prevent longitudinal and lateral displacement of said lug,

and means comprising spring clamping-arms carried by said lug and embracing said barrel to hold the teeth and notches in mesh whereby detachment of the lug may be effected by springing said clamping-arms away from the barrel to lower the lug and remove the teeth' from said notches.

5. In a repeating firearm having a tubular magazine, a forearm slidable on said magazine, said forearm comprising a handleportion enclosing a tubular liner slidably mounted on said magazine in spaced relation there to, said liner being contracted at one end thereof to form a bearing surface contacting said magazine.

6. In a repeating firearm having a tubular magazine, a forearm slidable on said magazinc, said forearm comprising a handle portion enclosing a tubular liner slidably mount ed on said magazine in spaced relation thereto, said liner being contracted at one end thereof to form a bearing surface contacting said magazine, and-an end collar threaded on the exterior of the contracted portion of said liner and engaging the end of said handle.

7. In a repeating firearm having a tubular magazine, a forearm slidable on said magazine, said forearm comprising a handle portion and a tubular liner surrounding said magazine in spaced relation thereto. said liner being contracted at one end'thereof to form a bearing surface'contacting said magazine, an end collar positioned at the opposite end of the liner forming an additional bearing surface and being flanged to engage the adjacent end of the handle, and a second end collar engaging the handle and being adjustably mounted on the exterior of the contracted portion of the liner.

8. In a repeating firearm having a. tubular magazine, a forearm slidable thereon, said forearm comprising a tubular liner surrounding said magazine in spaced relation thereto, an end collar having a. portion interposed between the magazine and said liner, diametrically opposed stop lugs on said magazine engageable with said collar to limit the movement of the forearm, said collar being longitudinally channeled at points substantially midway between said stop lugs, the forearm bei rotatable to align said stop lugs with said channels for removal of the forearm, and steadying means positioned in said channels between the magazine and collar to prevent side sway of the forearm under normal manipulation.

9. In a repeating firearm having a tubular magazine, a forearm slidable thereon, said forearm comprising a tubular liner surrounding said magazine in spaced relation thereto, an end collar having a portion interposed between the magazine and said liner, diametrically opposed stop lugs on said magazine engageable with said collar to limit the movement of the forearm, said collar being longitudinally channeled at points substan tially midway between said stop lugs, steadying lugs integral with said collar and positioned in said channels to bear against the magazine for preventing side sway of the forearm under normal manipulation, said CRAWFORD o. LooMIs. 

